NDLI: Denitrification of nitrate-contaminated groundwater using biodegradable snack ware as carbon source under low-temperature condition

Content Provider	Springer Nature Link
Author	Wang, J. L. Wang, X. M.
Copyright Year	2011
Abstract	A considerable increase in nitrate concentration in groundwater has been observed in many countries. This research focuses on nitrate removal using biodegradable snack ware (BSW) as both carbon source and biofilm support for denitrifiers. The denitrification efficiency of a laboratory-scale denitrification reactor packed with BSW was examined in a low-temperature condition. The nitrate removal efficiency supported by BSW decreased to approximately 40% at 12°C from nearly 100% at 25°C with 50 mg/L of nitrate-nitrogen in the influent and 2 h of hydraulic retention time (HRT). The complete nitrate removal was obtained when nitrate-nitrogen concentration was no more than 15 mg/L at 2 h of HRT and at 12°C. If the initial concentration of nitrate-nitrogen was 50 mg/L, 5 h of HRT was needed for the complete nitrate removal. Nitrite concentration in the treated water decreased evidently as HRT was increased from 2 to 5 h, or as nitrate-nitrogen concentration in the influent decreased to 15 mg/L from 50 mg/L. It was observed that varying HRT and nitrate concentration in the influent had no noticeable effect on dissolved organic carbon content in the effluent under the experimental conditions. This study indicated that the complete nitrate removal could be achieved readily even at 12°C using BSW as carbon source by changing HRT or the initial concentration of nitrate in the influent, which has some useful implications in environmental engineering practice.
Starting Page	113
Ending Page	118
Page Count	6
File Format	PDF
ISSN	17351472
Journal	International Journal of Environmental Science & Technology
Volume Number	9
Issue Number	1
e-ISSN	17352630
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-11-26
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecotoxicology Water Management Biodenitrification Waste Water Technology Aquatic Pollution Packed bed reactor Solid carbon source Environment Water Pollution Control Biofilm support Environmental Chemistry Soil Science & Conservation Environmental Science and Engineering
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Environmental Engineering Agricultural and Biological Sciences

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